Using QChart in visual studio

Question

I am trying to use the Qt QChart to plot a line graph. I am using visual Studio 2013 with Qt 5.8. I created a simple QApplication. When I paste QLineSeries *series it says QLineSeries is undefined. How can I fix this?

#include "QtGuiApplication2.h"
#include <QtWidgets/QApplication>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QtGuiApplication2 w;

    QLineSeries *series = new QLineSeries();

    w.show();
    return a.exec();
}

What's your toolchain? Visual studio with Qt VS Tools? – diverger Mar 14 '18 at 04:44 — diverger, Mar 14 '18 at 04:44

score 3 · Accepted Answer · answered Feb 07 '17 at 14:46

3

you need to link against QT5Charts under:

general properties
- Linker
  - Input
   - add the path: e.g. C:\Libraries\Qt\Qt5.7.0\msvc\lib\Qt5Chartsd.lib

I suppose, you don't forget to add the namespace?

using namespace QtCharts;

if you work with cmake, just add this to your cmake file:

find_package(Qt5Charts)
target_link_libraries(${targetName} Qt5::Charts)

answered Feb 07 '17 at 14:46

Soeren

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@soeren- I Tried that, I added it under additional Dependencies – amanda45 Feb 07 '17 at 14:51
1

and the namespace? – Soeren Feb 07 '17 at 14:51

score 1 · Answer 2 · answered Apr 02 '23 at 20:22

In my situation, I had also "undefined" all #include for QtCharts library. After a prolonged series of google searches, the following actions helped me (considering Visual Studio 2019 with Qt 5.15.2):

Check if you have macros $(Qt_INCLUDEPATH_) in (Project -> [Project] Properties -> C/C++ -> General -> Additional Include Directories) and macros $(Qt_LIBS_) in (Project -> [Project] Properties -> Linker -> Input -> Additional Dependencies). They should already have all the paths for the lib directories. You can check it by pressing near the field (Arrow down -> Edit... -> Macros>> -> [Insert the macros name]). If you have the paths in these macros then you don't need to add them again and go directly to point 3. If not, go to point 2.
Add a common path in (Project -> [Project] Properties -> General -> Additional Library Directories) as C:\Qt\5.15.2\msvc2019_64\lib (it can be a little different for you). With this precision, only the relative path can be mentioned in (Linker -> Input -> Additional Dependencies) i.e. Qt5Chartsd.lib. In (Project -> [Project] Properties -> C/C++ -> General -> Additional Include Directories) write the absolute path as C:\Qt\5.15.2\msvc2019_64\include\QtCharts (again, can be different).
With Qt VS Tools, there are new fields in (Project -> [Project] Properties ->...). You need (Qt Project Settings -> Qt Modules). As in Qt Creator, there's a need to add a new module charts. With (Arrow Down -> Select Modules...) near the field, you can even see all the modules which it's possible to activate. For me, I finally had core;gui;widgets;charts.
The solution worked for me without that point but just in case - add all the required dynamic libraries .dll in the same directory with your .exe project file. .dll libraries load at run time so they might help in certain cases.

Using QChart in visual studio

2 Answers2